Grease-cup.



C. CARSON.

GREASE CUP,

APPLICATION FILED SHEET I.

JUNE 25. I911.

, Patented Dec. 30

2 SHEE I! I!!! Ill/ll 4 C. CARSON.

GREASE CUP.

PPLICATION FILED JUNE 25, 1911.

4 1,326,389. Patented Dec. 30,1919.

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.view of the parts shown CLARK CARSON, 0F DAVENPORT, IOWA GREASE-CUP.

Specification of Letters Patent.

Patented as... so, rare.

Application filed June 25, 1917. Serial Ho. 176,730.

To all whom it may concern:

Be it known that I, CLARK CARsoN, a citizen of the United States, residing at Davenport, in the county of Scott and State of Iowa, have invented certain new and useful Improvements in Grease-Cups, of which-the following is a specification.

This invention relates to improvements in grease cups, and it is an object of the present invention to provide a'device of this class which can be readily refilled without removing the compression cap.

A further object is to provide a device of this class so designed that the compression cap can be quickly and readily returned to the position for refilling without the necessity of unscrewing it.

The above and other features of novelty, advantages and capabilities willbecome apparent from the detail description of the acpompanying drawings, in WhlCh I have illustrated a grease cup embodying my invention, but the device there shown is to be understood as illustrative only and not asv defining the limits of my invention.

In the drawings: s

Figure 1 is an elevation of my improved grease cup showing the compression-cap at its lower limit ,of movement.

Fig. 2 is a vertical transverse section through Fig. 1.

Fig. 3 is a similar view, but showing the compression cap at its upper limitof movement in the position it occupies when the cup is completely filled with grease.

Fig. 4. is a plan view of Fig. 1 with the upper portion of the cap removed to show the arrangement of the stopper and the coil spring therein.

Fig. 5 is a vertical transverse sectional view of a modified form of my grease cup, and showing the compression cap at its lower limit of movement.

Fi ."6 is a similar view partly in elevation, but s owing the compression cap at its upper limit of movement, this being the position it occupies when filled with grease.

Fig. 7 is a detail perspective extended in Fig. 6, preparatory to assembling.

Fig. 8 is a sectional view taken on the line 88 of Fig. 5. I

Fig. 9 is a further modification of the cup shown in Figs. 5 to 8.

Beferring to the drawings in detail, the

base member 10 is provided with a central integral nipple 11, which nipple is exteriorly threaded at one end, and is provided with a bore 12, which opens into an enlarged recess 13 for containing grease. The base member 10 has both a screw thread and a slot and pin connection with the compression cap 14, by means of the screw threads 15, slot 16 and projection 17.f. The screw threads on the member 10 are provided with stops 18, (see Fig. 7,) at-the top and bottom so that the compression cap cannot be entirely unscrewed from the base member. I

The compression cap 14 is formed of sheet metal with an upwardly and inwardl inclined end 19 terminating in a restricte orifice 20. Positioned within the upper portion of the cap 14 is the coil spring 2l, which is seated at itslower portion in the corrugations 22 and carries at its upper end the projection 23, upon which is suitably mounted the valve or stopper 24, which valve or stopper may be formed of fibrous or other suitable material. Situated at the .lower-portion of the cap 14: and struck up from the metal thereof, is the projection 17 This projection 17 engages with the threads 15 and the vertical slot 16, as already described.

Assuming that the supply of grease has been exhausted and it is desired to refill the cup, the compression cap is turned so. that the projection 17 registerswith the slot 16,

and as "the grease is forced through the restricted orifice 20 into the cup, the compression cap is automatically (without being unscrewed) raised until it has reached its upper limit of movement and the cup filled.

If desired, however, the cap can be readily 'and quickly raised to its upper limit of movement before forcing the grease into the cup by simply causing the projection 17 to register with the [slot 16 and then pulling upwardly on the cap. During the filling operation, the stopper 24 is pressed inwardly by the grease gun, and after the cup is filled the stopper will be returned to its normal position clearing the orifice 20 by virtue of the coil spring 21.

To prevent any accidental back turning of the compression cap while the device is in actual use, I provide the threads on the exterior of the base member 10 with small notches 25 (see Fig. 7,) withwhich the projection 17 registers, should the cap be maidentally turned back by the jars to which the cup may be subjected when in use or from other causes.

In the modification shown in Figs. 5'Q't0 8, the compression cap 14 is provided with the head 26. Spanning the compression cap against the under side of the head 26 is a resilien u valve 27, preferably constructed of leather, which leather is provided with a series of openings 28 as best shown in Figs. 5, 6 and 7 The head 26 for the compression cap is provided with a central opening 29, which head may be separate or formed integrally with the compression cap. In this form of my invention, the pin 30 is substituted for the projection 17. In refilling this form ofv my grease cup, the compression'cap when the grease cup is empty, is turned so that the pin 30 registers with the slot 16, and as the grease is forced through the opening 29 between the head of the compression cap and the resilient valve and into the cup, the compression cap is automatically raised without being unscrewed, as described in connection with the preferred embodiment. As in the preferred embodiment, the cap 14. may also be quickly raised in this modification by turning the cap until the pin 30 registers with the slot 16.

In Fig. 9 I have shown a still further modification of the valve through which the grease is forced into the cup. In this modification, the compression cap is provided in its central opening 29 with a cast rubber valve 31, having a central bore 32, which connects at its inner end with the slot 33, through which slot the grease is forced into the cup. For inclosing the cast rubber valve, I provide a cap 34. Secured centrally thereto by a wire or some other suitable means is a ball 35 adapted to normally engage the slot 33, and which ball acts as a cover or stop to prevent particles of for- ;eign substance from passing into the slot.

When it is desired to fill the cup shown.

is removed,-

in this modification, the cap 84 the grease gun placed over the rubber valve,

and the grease forced down through the I mally closing the opening 33 into the cup. I/Vhen the cup has been filled, the pressure exerted on the valve from the inside automatically closes the slot 27.

Having now described my invention, I claim:

1. In a grease cup, the combination of a base member provided with screw threads on its exterior, a compression cap provided with a non-resilient projection rigid with the cap and adapted to cooperate with said threads, and means on said threads to prevent the accidental backward turn of said cap, said means cooperating with said projection.

2. In a grease cup,'the combination of a base member, a compression cap connected with said base member and provided with an opening, a resilient valve normally against said opening and provided itself with unobstructed openings out of registry with the opening in said compression cap, said valve being designed to permit the grease being forced over and,thr0ugh it into the cup.

3. In a grease cup, the combination of a base member, a compression cap provided with a top having an opening therein for the admission'of lubricating means, a re silient valve in. said cap and against said opening and provided with unobstructed op'enings out of alinement with the cap opening to allow the grease to be forced over and through it into the cup.

4. A compression cap for grease cups, comprising a cylindrical pressed body portion open at one end, its opposite end terminating in a-restricted orifice, a valve noropening therein, a struck up pro]ection extending inwardly at said open end, and an inner circumferential corrugation near said covered end.

In witness whereof I hereunto subscribe my name to this specification in the presence of two witnesses.

CLARK CARSON. Witnesses:

' CLARENCE J. LOFTUS,

C. SHERMAN. 

